Project home-page: jsignpdf.sourceforge.net
JSignPdf is a Java application which adds digital signatures to PDF documents. It can be used as a standalone application or as an Add-On in OpenOffice.org. The application uses the jsignpdf-itxt library for PDF manipulations (based on iText library in version 2.1.7 with LGPL/MPL license). JSignPdf is open-source software and can be freely used in both private and business sectors.